Library /sys$common/syshlp/nclhelp.hlb set, osi_transport, template, acknowledgment_delay_time  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: 1             Value: 0-65

    Maximum amount of time, in seconds, that an AK TPDU is to be
    withheld. This attribute is valid for protocol class 4 only.

    set  [node node-id] osi transport template template-id -
         acknowledgment delay time integer

    Example:

    set osi transport template default acknowledgment delay time 1